[4232] | 1 | //memlock.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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| 5 | * |
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| 6 | * This file is part of roard a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * RoarAudio is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | */ |
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| 25 | |
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| 26 | #include "roard.h" |
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| 27 | |
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[4234] | 28 | #define MAX_SEGMENTS 16 |
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| 29 | |
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| 30 | struct memlock { |
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| 31 | int level; |
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| 32 | void * addr; |
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| 33 | size_t len; |
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| 34 | }; |
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| 35 | |
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| 36 | static struct memlock memlock_table[MAX_SEGMENTS]; |
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| 37 | |
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| 38 | static volatile int memlock_table_inited = 0; |
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| 39 | |
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| 40 | static void memlock_table_init (void) { |
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| 41 | if ( memlock_table_inited ) |
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| 42 | return; |
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| 43 | |
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| 44 | memset(memlock_table, 0, sizeof(memlock_table)); |
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| 45 | |
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| 46 | memlock_table_inited = 1; |
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| 47 | |
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| 48 | memlock_register(MEMLOCK_MEDIUM, memlock_table, sizeof(memlock_table)); |
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| 49 | } |
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| 50 | |
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| 51 | int memlock_register(int level, void * addr, size_t len) { |
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| 52 | int i; |
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| 53 | |
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| 54 | if ( !memlock_table_inited ) |
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| 55 | memlock_table_init(); |
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| 56 | |
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| 57 | for (i = 0; i < MAX_SEGMENTS; i++) { |
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| 58 | if ( memlock_table[i].addr == NULL ) { |
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| 59 | memlock_table[i].level = level; |
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| 60 | memlock_table[i].addr = addr; |
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| 61 | memlock_table[i].len = len; |
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| 62 | return 0; |
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| 63 | } |
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| 64 | } |
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| 65 | |
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| 66 | return -1; |
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| 67 | } |
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| 68 | |
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[4244] | 69 | static inline int memlock_lock(struct memlock * seg) { |
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| 70 | return roar_mm_mlock(seg->addr, seg->len); |
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[4241] | 71 | } |
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| 72 | |
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[4244] | 73 | static inline int memlock_unlock(struct memlock * seg) { |
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| 74 | return roar_mm_munlock(seg->addr, seg->len); |
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[4241] | 75 | } |
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| 76 | |
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[4233] | 77 | int memlock_str2level(const char * str) { |
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| 78 | if ( str == NULL ) |
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| 79 | return -1; |
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| 80 | |
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| 81 | if ( !strcasecmp(str, "none") ) { |
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| 82 | return MEMLOCK_NONE; |
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| 83 | } else if ( !strcasecmp(str, "low") ) { |
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| 84 | return MEMLOCK_LOW; |
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| 85 | } else if ( !strcasecmp(str, "medium") ) { |
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| 86 | return MEMLOCK_MEDIUM; |
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| 87 | } else if ( !strcasecmp(str, "all") ) { |
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| 88 | return MEMLOCK_ALL; |
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| 89 | } else if ( !strcasecmp(str, "default") ) { |
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| 90 | return MEMLOCK_DEFAULT; |
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| 91 | } else { |
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| 92 | return -1; |
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| 93 | } |
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| 94 | } |
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| 95 | |
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| 96 | int memlock_set_level(int level) { |
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| 97 | static int old_level = MEMLOCK_NONE; |
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[4241] | 98 | int i; |
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| 99 | int ret = 0; |
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[4233] | 100 | |
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[4234] | 101 | if ( !memlock_table_inited ) |
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| 102 | memlock_table_init(); |
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| 103 | |
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[4233] | 104 | if ( level == old_level ) |
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| 105 | return 0; |
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| 106 | |
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[4241] | 107 | for (i = 0; i < MAX_SEGMENTS; i++) { |
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| 108 | if ( memlock_table[i].addr == NULL ) { |
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| 109 | if ( level > old_level ) { |
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| 110 | if ( memlock_table[i].level > old_level && memlock_table[i].level <= level ) |
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| 111 | if ( memlock_lock(&(memlock_table[i])) == -1 ) |
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| 112 | ret = -1; |
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| 113 | } else { |
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| 114 | if ( memlock_table[i].level <= old_level && memlock_table[i].level > level ) |
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| 115 | if ( memlock_unlock(&(memlock_table[i])) == -1 ) |
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| 116 | ret = -1; |
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| 117 | } |
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| 118 | } |
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| 119 | } |
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| 120 | |
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| 121 | old_level = level; |
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| 122 | |
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| 123 | return ret; |
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[4233] | 124 | } |
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| 125 | |
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| 126 | void memlock_unload() { |
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| 127 | } |
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| 128 | |
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| 129 | void memlock_reload() { |
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| 130 | } |
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| 131 | |
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[4232] | 132 | //ll |
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